I'm now at work, and cannot check but it should be dynamic. The configure of opebabel ny dedafult shuld build dynamic and static libs (--enable-shared[=PKGS] build shared libraries [default=yes]). I cannot think of anyone reason to have build static libs but maybe I need to specify --enable-shared. Anyway I have tried the repository version of Ubuntu (ver 2.0.2, and it should be dynamic) with the same error.
Anyway I'll try to rebuild openbabel with explicit --enable-shared and tell you the outcome.
Thanks